Electrochemical behavior of carbon paste electrode with gold-bearing pyrite in bioleaching
文献类型：会议论文
| 作者 | Wu, Zhi1; Zhong, Shui Ping1,2; Wu, Zeng Ling1,3; Huang, Zhong Sheng1; Chan, Brenda K.C.1 |
| 出版日期 | 1905-07-05 |
| 会议日期 | October 8, 2013 - October 11, 2013 |
| 会议地点 | Antofagasta, Chile |
| 关键词 | Electrochemical electrodes - Sulfur compounds - Bioleaching - Oxidation - Carbon - Cyclic voltammetry - Polarization - Pyrites |
| 卷号 | 825 |
| DOI | 10.4028/www.scientific.net/AMR.825.360 |
| 页码 | 360-363 |
| 英文摘要 | The dissolution of gold-bearing pyrite plays an important role in gold extraction. This paper describes a fundamental study on the electrochemical behavior and reaction mechanisms of gold-bearing pyrite leaching in the form of Carbon Paste Electrode (CPE) with and without microorganisms using Cyclic Voltammetry (CV) and polarization curve. A two step process was suggested from Cyclic voltammetry. Electrode passivation by elemental sulphur was observed below 700mV (vs. SCE), elemental sulphur was then oxidized to sulphate when the electrode potential further increased from 700mV. The polarization current density of CPE and the oxidation rate of pyrite are further enhanced by the presence of microorganisms. Analyses of EDS and XPS confirmed the formation of elemental sulphur and sulphate. This electrochemical method successfully showed its simplicity and reliability to measure oxidation rate of gold bearing pyrite. 漏 (2013) Trans Tech Publications, Switzerland. |
| 资助机构 | Trans Tech Publications Ltd, Kreuzstrasse 10, Zurich-Durnten, CH-8635, Switzerland |
| 会议录 | 20th International Biohydrometallurgy Symposium, IBS 2013
 |
| 学科主题 | Microorganisms |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/59452]  |
| 作者单位 | 1.State Key Laboratory of Comprehensive Utilization of Low-Grade Refractory Gold Ores, Zijin Mining Group Co. Ltd, Shanghang 364200, China 2.Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China 3.Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China |
| 推荐引用方式 GB/T 7714 | Wu, Zhi,Zhong, Shui Ping,Wu, Zeng Ling,et al. Electrochemical behavior of carbon paste electrode with gold-bearing pyrite in bioleaching[C]. 见:. Antofagasta, Chile. October 8, 2013 - October 11, 2013. |
入库方式： OAI收割
来源：过程工程研究所
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